A hemagglutinating activity was detected in a synaptic vesicle-enriched fraction prepared from adult rat brain, using trypsinized glutaraldehyde-fixed rabbit erythrocytes. The specific activity of the fraction, in two series of experiments, was 7.5 and 16-fold higher than in the other subcellular fractions. The activity was absent from the synaptosome cytosol. In a study using twenty-five different carbohydrates and glycoproteins, best inhibitors were N-acetylneuraminic acid and N-glycolylneuraminic acid, together with bovine submaxillary mucin and a glycopeptide fraction prepared from rabbit erythrocyte membranes. The activity was thermolabile and very sensitive to proteolytic enzymes (but insensitive to neuraminidase) indicating that a protein (agglutinin) is responsible for the activity. Experiments using detergents and high ionic strength showed that the agglutinin is tightly bound to membranes, inactivated by the so-called non denaturing detergents, and stable in diluted sodium dodecyl sulphate. Hypotheses are discussed on the possible function of the agglutinin.
A HEMAGGLUTININ SPECIFIC FOR SIALIC ACIDS IN A RAT-BRAIN SYNAPTIC VESICLE-ENRICHED FRACTION / M. POPOLI, A. MENGANO. - In: NEUROCHEMICAL RESEARCH. - ISSN 0364-3190. - 13:1(1988), pp. 63-67.
|Titolo:||A HEMAGGLUTININ SPECIFIC FOR SIALIC ACIDS IN A RAT-BRAIN SYNAPTIC VESICLE-ENRICHED FRACTION|
POPOLI, MAURIZIO (Primo)
|Settore Scientifico Disciplinare:||Settore BIO/14 - Farmacologia|
|Data di pubblicazione:||1988|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1007/BF00971856|
|Appare nelle tipologie:||01 - Articolo su periodico|